#DailyBreaking: Florida shooting: US high school students stage mass walkout

Encourage military veterans and retired police officers to become teachers

Improve background and mental health checks

In addition, a new federal commission on school safety will examine the age limit issue.

Chuck Schumer, leader of the opposition Democrats in the Senate, dismissed the White House’s action plan as “baby steps”.

When the state of Florida passed a gun control law which raises the legal age for buying rifles to 21, it was sued by America’s main gun lobby, the National Rifle Association, which argues that such curbs violate the US constitution.

In a separate incident, a teacher in California is believed to have accidentally fired a gun in a classroom on Tuesday, injuring a student.

Police said the teacher at Seaside High School, in Monterey County, had been taking a public safety class when he accidentally discharged the weapon into the ceiling.

Officials said one student was injured by either bullet fragments or ceiling debris and was taken to hospital for treatment

The teacher has been placed on administrative leave and the incident is being investigated, police said.